Ben Ramsey has posted a complete walk-through of setting up and configuring Jenkins on an AWS instance for testing your PHP applications.

One of my first tasks at ShootProof was to set up a Jenkins server for continuous integration and get it ready to run unit tests for PHP and JavaScript code. There are plenty of tutorials around the web to help you do just that. This is yet another one, but it’s primarily my cleaned-up notes -and less of a tutorial - placed here for my future self to find and provided publicly for all to benefit. These instructions are specifically tailored for setting up Jenkins on an Amazon Linux EC2 instance.

While he doesn't call it a "tutorial" it's still a great step-by-step guide to the things you'll need and the process to follow including commands, installing and starting Jenkins and configuring the environment to execute your tests. The main goal was to set it up for PHP-based applications, but he also throws in the setup of some Javascript testing via Node.js and the PhantomJS/CasperJS combo.